By overlaying maps of 17 activities such as fishing, coastal development and shipping pollution, US researchers have produced a composite picture of man-made damage to the seas.

　
英 美
  • 通過(guò)將捕魚(yú)、沿海開(kāi)發(fā)及航運污染等17項活動(dòng)的地圖進(jìn)行重疊，美國研究人員得到了人為海洋危害的綜合圖。
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